APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

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Expand view Topic review: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by starman » Fri Dec 30, 2011 2:35 am

Also, notice there are several Polar outflows from forming stars (the small, slightly triangular jobs - there's a bright one at the bottom). Maybe the shape of the waterfall itself is caused by the presence of a massive but unseen star, itself probably in the throes of formation and not yet hot enough to register on the photo. The outflows are actually conical but show up as triangular on a 2-d image. Terrific picture, and not just awe-inspiring. Instructive too!

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by StarGrizzly » Sun Nov 27, 2011 2:57 pm

Amazing photo! almost impossible

I've wondered how it formed

Tanks to APOD for these wonderful pictures.

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by jasonbetska » Mon Nov 07, 2011 12:23 pm

I like to think this beautiful picture is showing us what a wormhole could look like. What if the ionized gas were being either heated up as they travled through this wormhole or its sucking in the gases from the nebula and illuminating the path the gases travel in. I believe in the description it was explained to seem like its flowing downward. Could we be witnessing the first ever wormhole caught on film

Thanks

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by chris533 » Sat Oct 29, 2011 11:44 am

I allways think that galaxies looks like water going down a drain. An explanation for the waterfall nebula could be a galaxie reamerging like water would on the other side of a drain.

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by jorobar » Fri Oct 28, 2011 12:00 am

While the waterfall is beautiful and interesting, the Herbig-Haro object in the lower left is one of the most interesting of its kind I have seen. There is a second faint object above the upward pointing object apparently from an earlier ejection and complex looking objects to the left and right of the line. Does anyone know of further pictures or studies of this complex?

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by DavidLeodis » Tue Oct 25, 2011 11:52 am

It's a fascinating and intriguing image. :)

I would like to mention that the "One hypothesis" and the "Another hypothesis" links both (currently at least) bring up the same webpage :!:

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by NoelC » Tue Oct 25, 2011 3:35 am

Reminds me a bit of a photo of Linville Falls I shot back about 30 years ago. It's eroded a good bit since then. Gee it makes you feel old when in your lifetime geology changes... Sigh.
Linville Falls, ca. 1981
Linville Falls, ca. 1981
-Noel

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by Beyond » Tue Oct 25, 2011 2:44 am

bystander wrote:No, HH-34 is the proto-star, jets, and shock waves. Practically all of the subimage I presented above.

The jets would expand as they get further from the source, the white spots, I suspect are just a bit more energetic.

Here is a close up.
Well, i must say that once i reconized it was the same thing as what was being shown as vertical in the APOD picture, it sure doesn't look like a baseball bat.
I guess it makes a big difference in how it looks when it is zoomed in on and you can't see the waterfall and other stuff. So much for Spaceball. :(

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by TNT » Tue Oct 25, 2011 1:47 am

Anyway, how can a waterfall be stagnant if the water is constantly falling? Or do you mean the top of the waterfall is stagnant?

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by neptunium » Tue Oct 25, 2011 1:37 am

deathfleer wrote:waterfall with neither lake nor rivers, it must be a stagnant waterfall
Actually, the water is still falling. It hasn't reached the ground yet.







Oh, that's right - there is no ground! :mrgreen:

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by bystander » Mon Oct 24, 2011 9:52 pm

No, HH-34 is the proto-star, jets, and shock waves. Practically all of the subimage I presented above.

The jets would expand as they get further from the source, the white spots, I suspect are just a bit more energetic.

Here is a close up.

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by Beyond » Mon Oct 24, 2011 9:38 pm

bystander wrote:
Beyond wrote: Yup....If by HH-34 you mean the red tubie looking thingy. It shows up a LOT better when you go to the Waterfall link and click on the picture to magnify it.
HH-34 is the proto-star (the star on the end of your bat), the jet (your bat), and the shock wave at the end of the jet. There is also a unseen jet in the opposite direction, as evident from the shock wave at the top of the cropped image.
So... HH-34 is the white spot at the handle. Then going down to the barrel of the bat, what are those 5-oval white shapes in a row??
They show up pretty good using the magnified waterfall link picture and a magnifying glass. That's why i call it a bat. In the magnified picture, the length under HH-34 is thinner than farther down where the 5-oval white spots are, the barrel of the bat.

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by biddie67 » Mon Oct 24, 2011 8:47 pm

What a gorgeous formation - hope the knowledge of how it formed and will change in the future is discovered .....

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by Donnageddon » Mon Oct 24, 2011 7:33 pm

That pic is just filled to the brim with WTF?

Wonderful, thanks APOD!

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by bystander » Mon Oct 24, 2011 4:55 pm

Hunter wrote:Would love it, APOD, if you put a Facebook "share" button with your photos. Would love it!
Facebook: Astronomy Picture of the Day (APOD)

Share the page links or the images from the photo albums!
Like the page! Tell your friends!

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by Hunter » Mon Oct 24, 2011 4:40 pm

Would love it, APOD, if you put a Facebook "share" button with your photos. Would love it!

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by bystander » Mon Oct 24, 2011 3:26 pm

Beyond wrote: Yup....If by HH-34 you mean the red tubie looking thingy. It shows up a LOT better when you go to the Waterfall link and click on the picture to magnify it.
HH-34 is the proto-star (the star on the end of your bat), the jet (your bat), and the shock wave at the end of the jet. There is also a unseen jet in the opposite direction, as evident from the shock wave at the top of the cropped image.

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by neufer » Mon Oct 24, 2011 1:22 pm

.



HH-222 in the region of NGC 1999 :!:

Quick, call 555-

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by tpot » Mon Oct 24, 2011 12:56 pm

What a wonderful picture of this phenomenon in the sky. While looking at it closely I picture the head and partial body of a giant ape at the left of the waterfall looking at me. He has one perfect eye and one with a star. Amazing!!!
I look forward every day to see the APOD. Thank you.

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by orin stepanek » Mon Oct 24, 2011 12:32 pm

I don't know what causes it either; but waterfall is a good name for it. 8-)
Hey! Ya notice the curious kitty? :lol:

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by nstahl » Mon Oct 24, 2011 11:12 am

As I understand it there are competing hypotheses about the "waterfall" itself, one holding that it's a shock wave, which presumably would over time manifest itself more toward the top and right of where we see it now, and the other hypothesis holding that it's a jet, likely moving out from the upper left end. For what extremely little it's worth, my intuition is claiming it could concieve of the former case, with the non-intuitive shape perhaps due to different materials the wave passed through in the upper part versus the lower part causing slower or faster progress. But my intuition is having a real tough time explaining a jet with a bent shape like that one.

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by JDR » Mon Oct 24, 2011 11:06 am

Here's a 14-year time lapse video. These jets zip right along:

http://hubblesite.org/newscenter/archiv ... 0/video/f/

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by JDR1 » Mon Oct 24, 2011 10:52 am

You guys need to shed a little more light on the situation:

http://upload.wikimedia.org/wikipedia/c ... _HH-34.jpg

In this image the entire structure (with the corresponding curved streamer on the far side from the black hole) is clearly visible.

JD

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by nstahl » Mon Oct 24, 2011 10:48 am

Vincent Pinto wrote:
What created the Waterfall Nebula? No one knows.
You might consider saying instead, "We don't know." Else you are speaking for all persons, which is patently absurd, and smacks of pontification.
If the APOD folks say "no one knows" something about astronomy there's a good chance of it being the true situation and that's instructive. And of course we can reserve our judgement if we've found them to speak falsely in such situations in the past. But If they only say "we don't know" when they don't, it's clearly true but doesn't tell us the general state of knowledge about the issue.

As an example suggested by your post, if the Pope did say "no one knows" about an issue I personally would be unlikely to believe that.

Oh, and yet another great APOD. Beautiful and mysterious, too!

Re: APOD: HH 222: The Waterfall Nebula (2011 Oct 24)

by deathfleer » Mon Oct 24, 2011 10:00 am

waterfall with neither lake nor rivers, it must be a stagnant waterfall

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